For example, jml and I were talking about how gruelling and exhausting a full weekly review is.

I don't enjoy it. Something must be wrong. I dread it.

We concluded that the crucial thing is getting the Inbox to empty a few times a week - if not once a day. I suggested that checking Someday/Maybe and higher-altitude vision/goals stuff could be put in the calendar for a less frequent basis - monthly, quarterly.

I haven't done a full weekly review on a weekly basis for years.

I also suggested that other things could be done more regularly, during braindead slots - checking Waiting For, scanning overall system etc.